Testing results - average by year

State and national drinking water standards and health guidelines

Health Guideline 0.04 ppb

The health guideline of 0.04 ppb for cadmium was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to internal organs.

ppb = parts per billion.

EPA Maximum Contaminant Level (MCL) 5 ppb

The enforceable federal standard that defines the highest level of a contaminant allowed in drinking water.

ppb = parts per billion.

EPA Maximum Contaminant Level Goal (MCLG)5 ppb

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.